﻿88 
  • 
  THEOBALD 
  ! 
  GEOLOGY 
  OE 
  PEGU. 
  

  

  only 
  in 
  Eastern 
  Prome, 
  some 
  four 
  or 
  five 
  miles 
  South-west 
  of 
  Zen 
  ; 
  

   but 
  I 
  was 
  unable 
  to 
  discover 
  the 
  precise 
  bed 
  from 
  which 
  they 
  were 
  

   derived. 
  They 
  are 
  collected 
  by 
  the 
  natives 
  in 
  their 
  hill 
  clearings, 
  and 
  

   in 
  streams 
  after 
  rain; 
  and 
  are 
  called 
  by 
  them 
  f 
  fossil 
  betel-nuts.' 
  

   From 
  their 
  perfect 
  preservation 
  and 
  mode 
  of 
  occurrence, 
  they 
  are, 
  I 
  doubt 
  

   not, 
  derived 
  from 
  some 
  soft 
  shaly 
  band 
  out 
  of 
  which 
  they 
  weather 
  and 
  

   get 
  revealed 
  from 
  time 
  to 
  time 
  by 
  the 
  plough 
  or 
  heavy 
  rain. 
  One 
  very 
  

   perfect 
  and 
  quite 
  unweathered 
  and 
  unrolled 
  specimen 
  was 
  picked 
  up 
  by 
  

   a 
  servant 
  of 
  mine 
  on 
  the 
  surface 
  of 
  a 
  thick 
  bed 
  of 
  blue 
  shale 
  in 
  the 
  

   Paday 
  stream 
  below 
  the 
  village 
  of 
  Nyoung-beng-khyeng, 
  40 
  miles 
  East- 
  

   south-east 
  of 
  Thaietmio 
  ; 
  but 
  a 
  careful 
  search 
  did 
  not 
  reveal 
  any 
  other 
  

   fossils 
  in 
  the 
  bed 
  in 
  question 
  j 
  still, 
  I 
  am 
  of 
  opinion 
  that 
  the 
  fossil 
  was 
  

   really 
  derived 
  from 
  some 
  little 
  arenaceous 
  marly 
  vein 
  or 
  pocket 
  in 
  the 
  

   shale 
  whereon 
  it 
  was 
  picked 
  up. 
  Associated 
  with 
  the 
  Pseudo-diadema 
  

   and 
  in 
  the 
  same 
  mineral 
  condition, 
  indicating 
  a 
  ferruginous 
  marlstone 
  as 
  

   matrix, 
  occurs 
  a 
  species 
  of 
  Lucina, 
  well 
  preserved 
  with 
  both 
  valves 
  

   united, 
  and 
  a 
  few 
  other 
  ill-preserved 
  shells. 
  

  

  Now, 
  the 
  position 
  of 
  the 
  beds 
  which 
  contain 
  the 
  Pseudo-diadema, 
  

   and 
  the 
  shark's 
  teeth 
  which 
  seem 
  identical 
  with 
  those 
  found 
  in 
  the 
  

   Cretaceous 
  beds 
  of 
  South 
  India, 
  corresponds, 
  as 
  far 
  as 
  I 
  can 
  judge, 
  to 
  the 
  

   upper 
  portion 
  of 
  the 
  Prome 
  group; 
  the 
  general 
  facies 
  of 
  the 
  fauna 
  

   of 
  which 
  group 
  is 
  decidedly 
  suggestive 
  of 
  an 
  age 
  younger 
  than 
  the 
  

   Miocene, 
  rather 
  than 
  older. 
  Are 
  we 
  then 
  to 
  believe 
  that 
  characteristic 
  

   Cretaceous 
  forms 
  survived 
  in 
  these 
  seas 
  down 
  to 
  Pliocene 
  times 
  ; 
  or 
  that 
  

   an 
  unestablished 
  outlier 
  of 
  Cretaceous 
  beds 
  exists 
  among 
  those 
  of 
  the 
  

   newer 
  group? 
  I 
  confess 
  my 
  own 
  view 
  would 
  lead 
  me 
  to 
  adopt 
  the 
  former 
  

   supposition 
  ; 
  but 
  the 
  question 
  is 
  too 
  important 
  a 
  one 
  to 
  be 
  settled 
  on 
  

   the 
  slender 
  evidence 
  before 
  us. 
  Some 
  years 
  since, 
  among 
  a 
  few 
  fossils 
  

   forwarded 
  by 
  me 
  to 
  Dr. 
  F. 
  Stoliczka, 
  from 
  quite 
  another 
  locality, 
  was 
  a 
  

   Terelratttla 
  which. 
  Di\ 
  Stoliczka 
  considered 
  as 
  very 
  Cretaceous-looking; 
  

   but 
  this 
  was 
  from 
  a 
  village, 
  Tamabeng, 
  on 
  the 
  Pegu 
  River, 
  and 
  can 
  have 
  

   ( 
  27G 
  ) 
  

  

  